Analysis of precision casting surface quality are as follows:
1 surface roughness of castings shall comply with the provisions of GB6060.1 casting surface roughness comparison specimens.
2 of the surface of castings to be polishing processing according to GB6060.4 regulations.
3 castings to be shot peening, surface processing according to GB6060.5 regulations.
4 Casting cracks are not allowed, less casting, porosity, bubble and any penetrating defect.
5 casting does not allow abrasions, depression, lack of meat and netted burr isosceles triangle defect.
6 cast gate, flash, overflow, septal skin should be cleaned, but allowed to leave traces.
7 screw holes start screwing four tooth distance will not be permitted defect.
8 without affecting the casting under the conditions used, when the consent of the consent, the supplier ofcastinginfiltration and repair (such as welding, deformation correction etc.) treatment, the repair treatment of die castingshould make the corresponding quality inspection.
9 casting surface roughness for: 25um.
10 casting non processing surface and processing surface, allowing: